公开(公告)号：US11778858B1

公开(公告)日：2023-10-03

申请号：US17517463

申请日：2021-11-02

Applicant: Apple Inc.

Inventor： Yuan Chen ,  Tae Woon Cha ,  Jie Li ,  Junhwan Lim ,  Xiaokai Li ,  Zhibing Ge ,  Guanjun Tan ,  Giovanni Carbone ,  Jose A. Dominguez-Caballero ,  Thanh Son Nguyen

IPC: H10K50/858 ,  G02F1/1335 ,  H10K59/38 ,  H10K59/35

CPC classification number: H10K50/858 ,  G02F1/133514 ,  G02F1/133526 ,  H10K59/353 ,  H10K59/38

Abstract: An electronic device may have a display with an array of display pixels. To increase the efficiency of the display, the display may also include an array of microlenses. Each microlens may overlap and focus light from a respective pixel. Pixels for one of the colors of light may have a high aspect ratio. These pixels may be covered by two microlenses or a single cylindrical microlens. The microlens dimensions may be tuned to mitigate non-uniformities in the brightness profiles of the pixels. The microlens edges may be laterally shifted towards or away from the center of the light-emitting areas to either reduce or increase the focusing power of the microlens. The microlenses and color filter elements in each pixel may also be shifted to account for the chief ray angle of the display.

公开(公告)号：US20230324740A1

公开(公告)日：2023-10-12

申请号：US18169339

申请日：2023-02-15

Applicant: Apple Inc.

Inventor： Thanh Son Nguyen ,  Xiaokai Li ,  Yuan Chen ,  Zhibing Ge ,  Jian Gao

IPC: G02F1/1362 ,  G02B27/01 ,  G02F1/1335 ,  G02F1/13357

CPC classification number: G02F1/13362 ,  G02B27/0172 ,  G02F1/133603 ,  G02F1/133605 ,  G02F1/133607 ,  G02F1/133621 ,  G02F1/136281 ,  G02B2027/0112 ,  G02F2203/07

Abstract: A display may include illumination optics, a ferroelectric liquid crystal on silicon (fLCOS) panel, and a waveguide. The illumination optics may produce linear polarized illumination light that is modulated by the fLCOS panel to produce image light. The illumination optics may include light emitters that emit respective wavelengths of the illumination light. The illumination optics may include an X-plate that outputs the illumination light by combining the light emitted by the light emitters. Polarization recycling structures may be optically interposed between each of the light emitters and the X-plate. The polarization recycling structures may include a reflective polarizer. If desired, the polarizing recycling structures may also include a quarter waveplate. The polarization recycling structures may serve to minimize the amount of light lost in producing linearly polarized illumination light for the fLCOS display panel, thereby maximizing the optical efficiency of the display.